Sedimentary Responses of Retreating Shelf Break from Oligocene to Miocene, in Deep Water Area of Baiyun Depression, South China Sea

Key words: 
• Baiyun Depression

Abstract: Retreating Shelf Break occurred from Oligocene to Miocene in deep water area of Baiyun depression, South China Sea, which controlled the development and distribution of sedimentation in the study area. And, to some extent, effective reserves are formed. Based on the latest drilling data, detailed sedimentary analysis and meticulous interpretation of long cable, high quality, three dimensional seismic data, research of sedimentary responses of retreating shelf break is carried out, meanwhile integrating the theories of shelfmargin delta, which indicates that the responses of shelf break is shelfmargin delta progradational system of Zhuhai Formation in Oligocene and growth faults complicating shelfmargin delta and deepwater fan system of Zhujiang Formation. This discovery will be favorable for oil and gas exploration of Baiyun Depression.